1. The control panel is repaired and replaced by all of 18VB brushless electric wrenches, and can be directly replaced2. Wiring should pay attention to distinguish the positive and negative poles of the power supply ( positive and black negative poles), so as not to burn the wrong board 3. The motor only connects to the three thickest wires, and there is no color option. Wire sequence. If the motor is reversed, just change the two motors at will. If the motor is Hall, the 5 Hall wires are not connected, which has no effect on the function.4. Precautions before commissioning: If the machine is a split motor (the stator and rotor can be separated in this area), you must first install the housing cover and tighten the screws, then gently twist the square shaft. Make sure that the motor is fixed OK, you can press the power switch.5.Buy only the control board. When inserting the switch, you must insert it vertically to avoid bending the pins in the switch socket on the control board with improper force, which may cause the test machine to be unusable. If the board is damaged, the buyer is responsible for it Product Name: Brushless Control PanelVoltage: 18V (5 strings of 2 and 10 cells or 5 strings of 3 and 15 cells lithium batteries).Power: 300WB brushless full-sensing or non-inductive three-phase motor.Protection function: battery high and low voltage protection, circuit and over temperature protection, over current protection, self-discharge protectionColour:blackMaterial:ABSPackage Contents:1 x Brushless control boardOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.